Bobbin-feeler stop-motion for looms.



J. O. LIBERTY.

BOBBIN FEELER STOP MOTION FOR LOOMS.

APPLICATION FILED JAN. 9, 1914.

Patented Jan. 5, 1915.

2 SHEBTS-SHEET 1.

11v VENTOR,

J. C. LIBERTY. IBOBBIN FBELER VSTOP MOTION FOR LOOMS. APPLICATION FILED ,JAN.9, 1914.

l 1 24,044, Patented Jan. 5, 1915.

2 SHEETS-SHEET 2.

5&

ATTORNEY.

JERRY C. LIBERTY, 0E EALGTEAWTON, MASSACHUSETTS.

BOBBIN-E'EELEB STO'E-MOTKON FOR LOOMS.

Specification of Letters Patent.

l atented Jan, 5, field.

Application filed January 9, 1914. serial No. 811,184.

To all whom it may concern:

Be it known that I, JERRY C. LIBERTY, a citizen of the United States of America, and resident of Easthampton, in the county of Hampshire and State of Massachusetts, have invented certain new and useful Improvements in Bobbin-Feeler Stop-Motions for Looms, of which the following is afull, clear, and exact description.

The object of this invention is to provide a stop motion for a loom which is operable for the stoppage of the loop when the thread or yarn on the bobbin of the loom shuttle becomes nearly exhausted so that the loom cannot be run for one or any number of picks'when there is no filling to be woven into the cloth.

The stop motion of the present invention is one which is employed in conjunction with the usual'weft stop motion, that is it contemplates the utilization of already known and also new. instrumentalities as follows :The lay provided with the shuttle box and the shuttle therefor, the weft fork slide, the shipper with which the weft fork slide coacts and the weft fork hammer, a tiltable member pivotally mounted on the weft fork slide havingan abutment-adapted to be engaged by the weft hammer in similar manner to the engagement by such hamrner of the weft fork, a feeler member having a position opposite the location of the shuttle box and adapted on the beating up movements of the lay to be successively moved by the bobbin thread when the same is present on the bobbin. but to be non-actuated or passive when there is an absence of thread on the bobbin, and means actuated by the feeler member, and for swinging the tiltable member of the weft fork slide for carrying an abutment of such tiltable member out of, or away from, the range of movement of the weft hammer. And for the carrying out of this invention in its most advantageous manner, I employ a shuttle bobbin of the particular construction which will be hereinafter fully described.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings :Figures 1 and 2 are plan views showing the bobbin feeler stop motion in conjunction with the usual weft stop motion,-Fig. 1 representing conditions whereby under a sufficiency of thread on the bobbin the fecler device will, be seecessively actuated and the loom continue its running, while Fig. 2 represents conditions whereby by reason of an exhausted condition of the thread on the bobbin the loom will be stopped. Fig. 3 is a perspective view of the stop motion. Figs. 4 and 5 are sectional views through the weft fork slide under conditions respectively correspondingv to those referred to in respect of Figs. 1

and 2. Fig. 6 is a view showing a slight and which through suitable or usual connections operatesthe clutch E appurtenant to the main shaft of the loom.

In Figs. 4 and 5, G represents the weft hammer; and the devices here referred to are the usual ones included in the most well known form of weft stop motions for looms and so operative that upon a breakage or failure of weft to be laid across the loom, the weft fork will not be swung to, elevate the tail or abutment (1 thereof, but will remain in the path of movement of the weft hammer to be engaged DY the latter, resulting in the sliding movement of the weft fork slide and the operation of the shipper, to stop the loom. There is pivotally mounted on the slide C a tiltable member J adjacent and forward of the weft fork and entirely independent thereof; and the same is provided with an actuating arm 6 forwardly odside from the pivot d, and it has an abutment or tail e adjacent the tail a. of the weft fork.

K represents a bracket supported on the loom frame at the end of the breast beam and opposite the location of the shuttle box, the same having upstanding apertured lugs f and g, and also made with a straight guiding slot k in a base portion thereof, which slot ranges in a line corresponding to the line of movement of the lay.

llf represents a feeler slide bar mounted and guided through said lugs f, g, and it has a member 5 'adjustably'clamped'or confined thereon, which member is formed with a bifurcated upper portion 11 and a depending stud g which, is engaging with, the bifurcated upper portion of the member 71 which is affixed on the feeler slide bar, while at its other end. the" said rockshaft has another lever arm t, which is in position for engages ment with the actuating arm 6 of the tiltable member carried on the weft fork. slide.

The shuttle box has its side toward the br'ea'stbeam made with an aperture 1', and

the bobbin R of the loom shuttle S for thepurposes of this invention is constructed in the particular manner especially shown in Figs. 3, 7 and 8, that is, the bobbln having the butt portion u of frusto-conical shape and the stem portion 21, of reduced diameter, has within said butt end portion a longitudinal recess '0, the depth of which toward the butt end of the bobbin is as great.

as that of such recess where the frustoconical portion'adjoins the stem. In other words, the base of the recess is parallel with the axes of the bobbin for its entire length.

The bobbins are so, wound that when nearly exhausted of thread, after all of the thread has been unwound off from the frusto conical butt portion, there is still a remnant of a fewyards on the stem of the bobbin as represented at zv inFig. 2; and it is, of course, apparent that when the bobbin is full 'or partially full, the thread thereon spans the recess orcavity a at the bobbin butt, and serves as means through which a forcing movement is imparted to' the feeler slide bar.

' While the loomis running with an amplitude of thread on thebobbin, the lay at each beat-up will cause the thread filled bobbin in the shuttle thereof to strike and forwardly forcethe feeler bar, resulting in the oscillation of the. rockshaft: the downswinging of the actuating arm of the tiltable member J and the moving of the abut ment e of such member out of the path of movement of the weft hammer," all, of course, with the result of causing no stoppage of the loom. But when the bobbin thread shall have become nearly exhausted,so that none thereof is around the recessed conition of the parts that the bobbin is carried com aratively axially close-tovthe end of the eeler bar and without efi'ect of slidably moving thesame; and consequently the rockshaft not being oscillated and the tiltable member J not being-swung, the weft fork slide will be forwardly forced under the stroke of the wefthammer for operating the shipper and stopping the loom,

thereby giving opportunity for bobbin replenishment before any possibility of loss of a pick.

It is to be especially brought to attention that by having the base of the bobbin recess as deep or near the axes of the bobbin at the end of such recess toward the bobbin butt, any rebound of the shuttle at the time of striking the picker, will not result in any detrimental effect for unduly causing, when there is an absence of weft thread at the recessed butt end of the bobbin, the undue movement of the feeler slide bar to displace the tiltable member when in fact it should remain in its position to receive the stroke of the weft hammer.

The bobbin at its frusto-conical butt portion as shown in Fig. 8, has the recess '0 duplicated at diametrically opposite sides thereof so that it is immaterial as to which side of the bobbin is placed in the shuttle forwardly thereof.

I have constructed some of the stop motions in accordance with this invention with a slightly different arrangement as represented in the-view of the modification, Fig. 6, that is I-have arranged the tiltable member J on the weft fork slide 0 with its actuating arm 6 rearwardly or toward the lay and with its tail or abutment e reversed or forwardly, and at a little distance ahead of the weft fork abutment a; and correspond,-

ing to this slightly different arrangement I.

provide a specially constructed weft hammer, that is" one having in addition to the usual portion w for striking the weft fork abutment, an ext nsion" y for coaction with the abutment of'tlie tiltable member J.

The bracket made-in the adjustable portions 8 and s? confined in their given separations by the bolt and slot construction indicated at a .9, enablesthe positioning of the feeler slide bar properly for coaction with bobbins-which maybe of different dimensions or which in the operation of the shuttle relatively to the picker mechanism may not always have their home posi- 'tions in the shuttle box exactly alike; and

it is perceived that the member 5 by being adjustablewn' the feeler, slide bar, and having a limitation at its normal position whereby the engagement end of the feeler may be nicely positioned to accord with the swing of the lay.

I claim I 1.. vIn a loom, in combination, the breast beam, the lay provided with the shuttle box,

and the shuttle therefor, the weft fork slide, the shipper with which said slide coacts mounted on the breast beam and the weft hammer, a tiltable member, mounted on the slide, having an abutment adapted to be engaged by the weft hammer,

- and having an actuating arm, a bracket supported at the end of the breast beam opposite the location of the shuttle box and having upstanding apertured lugs, a feeler slide bar slidably mounted through said ln s, adapted to be successively moved by t e thread of the bobbin when present thereon, and having a bifurcated member secured thereon, a retracting spring in compression between said bifurcated member and one of said lugs, a rock shaft having at onevend a lever arm bar provided with a -stud'in engagement with the said bifurcated member of the feeler slide and having at its other end another arm for cooperative engagement with the actuatingarm of said tiltable, slide-carried, member.

2. In a loom, in combination, the breast beam, the lay provided with the shuttle'box,

and'the shuttle therefor, the weft fork slide,

pivot ally the shipper with which said slide coacts mounted on the breast beam and the weft hammer, a tiltable member, pivotally mounted on the slide, havingan abutment adapted to be engaged by the weft hammer, and having an actuating arm, a bracket supported at the end of the breast beam opposite the location of the shuttle box and having upstanding apertured lugs and having astraight guiding slot therein, a feeler slide bar slidably mounted through said lugs adapted to be successively moved by the thread of the bobbin when present thereon and having a member adjustably confined thereon provided with an upstanding bifurcated portion and with a depending por: tion having a guided engagement in the slot of saidbracket, a spring in compression between said feeler slide bar member and one of said lugs, a horizontal rockshaft having at one endan upstanding lever provide with a stud in engagement with the said b1- furcated portion of the feeler slide bar member and having-at its other end another lever arm for coaction with the actuating arm of said tiltable slide carried member.

Signed by me at Springfield, Mass. in presence of twosubscribing witnesses."

JERRY C. LIBERTY.

Witnesses: G. R. DRISCOLL, WM. S. Bnmows. 

